Lathe attachment



Feb. 22, 1949. I T, D. PEAT I 2,462,126

LATHE ATTACHMENT Filed Sept. 7, 1945 5 mum-mun H Ell-i DINII ENTOR.

. HOMHS Em.

Patented Feb. 22, 1949 UNITED STATES PATENT OFFICE.

LATHE ATTACEMENT Thomas D. Peat, New-'York,.N. Y.

Application September 7, 1345; SerialN'o. 615,066

(Granted under the act of March 3', 1883, as

4 Claims.

amended April 30, 1928; 370 0. G. 757) This invention relates to a lathe attachment.

An: object of this invention is to provide a lathe attachment for cutting and duplicating contours.

Further objects and advantages of this invention, as well as its construction, arrangement and operation; will be apparent from the following description and claims in connection with the accompanying drawings, in which,

Fig'..1" isia plan view showing a portion of a 2 chamber is also provided with aplunger 36 (Fig; 1) having astem 3l'that-extends through the chamber end and is rotatably attached'to across,- arm 38 as at 33. The crossarm 38 is rotatably attached at'its other end as at-v 43:t'o;a support the also detachably; mounted upon the angle. base was at Mb; Oneend of a connecting, rod-Mi-is rotatably attached as at 42 to the crossarm 38. The other end of this rod '41: is iconnected to a lathe with the device of this invention attached lugx i3 (Fig. 3) boltedor otherwise secured to-the thereon, compoundrest. l3. Optionally the rodAlwCanbe Fig. 2=isasectional View taken on-the line 2--2 attached to the connecting. slide- 2L. Thus by of F ig. 1, and means of air pressure. against the plunger 36 a Fig. 3 is a sectional view taken on the line 33 steady" pull is maintained upon the compound of Fig. l. r rest. is: which forces theroller' 23'. against the Fig. 1 shows a conventional lathe, generally template 22atia1ltimes.-. The compound'rest I3 designatedg as lfi comprising ways H, having a and cutting tool l5'thereby. follow the contour. of saddl 2; mounted e A Compound rest the tem-platen. as the saddle! [2 moves uponthe 13 ha a tool po M providedwith a Cutting ways. The work I6 is automaticallycutto: the tool I5=is positioned upon the saddle l2. A piece contour-ofthe template. O o I6 to be machined is held in chuck l1. Theav air chamber 3i), and crossarm- 33- are The lathe H1 is p v with a conventional mounted at-a sufficient height above the angle taper attachment prising an angle b e It base la-to allow the connectingrod 41 to clear tachably secured to the saddle '2, a table '9 detheic'on'necting slide 2I| and assembly (gee-,Figs; tachably secured by a bracket 20 to the ways ll, 2 and and a connecting slide 2| detachably secured to The connecting d 4 is al provided with 315 5 2831 :5 f'gir nventi mpr ses a turnbuckle 44, for enabling it to be shortened or e a e 0 1S n C 1 lengthened according to the size of the work, or template detachably mounted upon the m to whether inside boring or according outside tititfittittit 3?!3 we to be e. of r n i F 23 can likewise e change as esired y securis i The device of this invention can. e altere o vice, generally designated as 24, for holding the fit other types f taper attacmnem-s,v and m. roller agamst f template able support members can be provided for lathes The template 22 15 from plece of having no taper attachment. If the lathe to be flat stock to provide any contour desired zp used has no attachment a suitable base 18, table the finished Plece work' T 9 template as l9, and connecting slide 2| can be provided as shown is provided with an arcuate edge 25. The shown resulting contour of the piece of work I6 is iden- In Operation, the desired contour of the tical to that of the template edge shed e of w rk i a certained and a uitable The roller 23, which is ball bearing mounted, Ce t 2 f 5 f fi t to 2 Th is provided with a shaft 26 (Figs. 2 and 3) atempa 6 P a O n e tached as by a washer 21 and nut 28 in slot 29 template 15 t as escn 9.1.0 2: (Fig. 1) in the connecting slide 2| in the posi- 23 is Pmpefly PS1t1ned and Qoldmg f fion usually occupied by the Shoe of the convem mountedand assembled. The air hose 32 is contional taper attachment nectelgi tobthesanr(isouiflgei ar ildhthe 1 112385111? mdthe The holding device 24 comprises an air cham- 0 am a J 8 D e In her 3|] detachably mounted upon the angle base the chuck I! as shown. The lathe is now started l8 as at 3!, and provided with an air hose 32 and the tool l5 takes a out following the contour connected toacompressed-air source 33. Apresof the template. After the initial adjustment, sure gauge 34 and bleeder valve 35 are provided duplication work can be accurately and swiftly so that any desired air pressure can be mainaccomplished by cil'elativelytunskilled persorrdnieil. tained within the air chamber. A pressure of It is to be un erstood hat various mo i caabout 40 p. s. i. is generally sufficient. The air tions and changes can be made in this invention without departing from the spirit and scope thereof as set forth in the appended claims.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

What is claimed is:

1. In combination with a lathe having a taper attachment including an angle base, table and connecting slide; a contour-duplicating attachment comprising a, template detachably secured to said table, roller means adjustably secured to said connecting slide for following said template, a compressed-air chamber having a plunger and stem mounted upon said base, a support mounted upon said base, a crossarm rotatably secured at one end to said plunger stem and at the other end to said support, and 'a connecting member rotatably secured to said crossarm and to said connecting slide and responsive to the air pressure in said air chamber yieldably to hold said roller means connecting said air chamber to a. source of compressedair, means for indicating the pressure in said air chamber, valve means for controlling thepressure' in said air chamber, a support mounted upon said base, a crossarm rotatably secured at one end to said plunger stem and at the other end to said support, and a connecting member rotatably secured to said crossarm and to said compound rest and responsive to the air pressure in said air chamber yieldably to hold said roller means against said template.

I 3. In combination with a lathe having a taper attachment including an angle base, table and connecting slide; a contour-duplicating attachment comprising a template detachably secured to said table, means adjustably secured to said connecting slide for following said template, a fluid-pressure chamber having a plunger and stem mounted upon said base, a support mounted upon said base, a cross-arm rotatably secured at one end to said plunger stem and at the other end to said support, and a connecting member rotatably secured to said crossarm and to said connecting slide and responsive to the fluid pressure in said chamber yieldably to hold said means against said template.

4. In combination with a lathe having ways, a saddle, and a slide; a contour-duplicating attachment comprising a template fixedly secured with respect to said ways, means secured to said slide for following said template, a fluid-actuated element mounted for movement on said base, a support mounted on said saddle, a crossarm rotatably secured at an end to said element and at the other end to said support, and a connecting member rotatably secured to said crossarm and to said slide and responsive to the actuatingfluid pressure yieldably to hold said means against said template.

THOMAS D. FEAT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 253,410 Miles Feb. '1, 1882 1,320,162 Marsh Oct. 28, 1919 1,442,661 Groene Jan. 16, 1923 1,933,224 'Smith Oct. 31, 1933 2,370,032 Groen Feb. 20, 1945 2,401,422 Hamilton June 4, 1948 

